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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Software Engineer C#.Net AWS - FinTech - **Company:** Client Server - **Location:** London, UK (Remote available) - **Salary:** £120,000.0 - **Contract:** Permanent contract - **Skills:** Agile Methodology, Artificial Intelligence, Amazon Web Services, C Sharp (Programming Language), Data Structures, Cursor (Graphical User Interface Elements), Python (Programming Language), Object-Oriented Software Development, Backend, Solid Principles, GPT - **Published:** August 21, 2026 - **Apply:** https://find.jobs/jobs-near-me/apply/ats-redirect/?id=2936214531-2 ## About the Role policy, with two days in the brand new London offices and flexibility to work from home two days a week (Thursdays and Fridays).About you:You are an experienced Software Developer / Engineer with a strong knowledge of modern best practiceYou have strong C# backend development skills, ideally also Python coding skillsYou have a good knowledge of AWSYou have experience of working on highly scalable systemsYou have a strong knowledge of Computer Science fundamentals such as OOP, Data Structures, Design PatternsYou have experience with, or a strong interest in Artificial Intelligence and are keen to explore the possibilities further e.g. ChatGPT, Claude, Cursor, CopilotYou have strong analysis and problem solving skills alongside organisation and planning abilitiesYou have business acumen and advanced communication / stakeholder management skillsWhat's in it for you:As a Principal Software Engineer you will earn a competitive package including:Salary to 120kBonus (c20%)Pension (5% employer contribution)25 days holiday (increasing to 27 after two years and 30 after)Life Assurance (4x base salary)Employee Assistance ProgrammeRange of training, career development and supported learningImpactful role working on cutting edge technology Apply now to find out more about this Principal Software Engineer / Developer (C# .Net AWS Python) opportunity. ## Description Principal Software Engineer / Developer (C# .Net AWS Python) London / WFH to 120kWould you like to join a growing and profitable scale-up that is viewed as a leading FinTech disruptor in a senior role that will allow you a great deal of influence and progression?As a Principal Software Engineer you will architect and build highly performant and scalable solutions using the Microsoft tech stack and SOLID design principles, collaborating with cross functional Agile project teams in 2 week Sprints, you'll be an advocate of best practice and ensure software is delivered to schedule. There's a host of new features and development work and you'll also help to drive the adoption of AI within the business, introducing things like chat bots and exploring the use of AI to make process improvements. This is an impactful role where you'll report into and collaborate with the CTO, you'll have a lot of visibility and quickly see the results of your work. Location / WFH:There's a hybrid ## Related Videos - [ Evaluating AI models for code comprehension](https://www.wearedevelopers.com/videos/1462-evaluating-ai-models-for-code-comprehension) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Phel, a native Lisp for PHP](https://www.wearedevelopers.com/videos/791-phel-a-native-lisp-for-php) - [Inside Bitpanda's Tech Stack: Scaling a European Fintech Leader - Markus Dorner](https://www.wearedevelopers.com/videos/1979-inside-bitpanda-s-tech-stack-scaling-a-european-fintech-leader-markus-dorner) - [Streaming AI Responses in Real-Time with SSE in Next.js & NestJS](https://www.wearedevelopers.com/videos/1630-streaming-ai-responses-in-real-time-with-sse-in-next-js-nestjs) - [Agentic employees in world's most downloaded FinTech app](https://www.wearedevelopers.com/videos/100123-agentic-employees-in-world-s-most-downloaded-fintech-app) ## Related Articles - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [Fullstack Developer Salary UK](https://www.wearedevelopers.com/magazine/251-fullstack-developer-salary-uk) - [Data Engineer Salary UK](https://www.wearedevelopers.com/magazine/253-data-engineer-salary-uk) - [Software Engineer Salary in The UK](https://www.wearedevelopers.com/magazine/231-software-engineer-salary-in-the-uk) - [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries) - [How Much Does a Software Engineer Make? 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